Door check and closer.



J. G. LOFGREN. DOOR CHECK AND CLOSER.

APPLICATION TILED MAE. s, 1911.

Patented Jan. 2, 1912.

WITNESSES: QIKM W By I l ATTORNEYS JQHN G. LOFGREN, OF NORWAY, MICHIGAN.

DOOR CHECK AND CLOSER.

Specification of Letters Patent.

Patented Jan. 2,1912.

Application filed March 8, 1911. Serial No. 612,989.

To all whom it may concern:

Be it known that I, JOHN G. LOFGREN, a citizen of the United States, and a resident of Norway, in the county of Dickinson and State of Michigan, have invented a new and Improved Door Check and Closer, of which the following is a full, clear, and exactde' scription.

The invention relates to devices for closing doors, gates and the like, and its object is to provide a new and improved door check and closer arranged to readily close the door after being opened and released, to prevent slamming of the door, and to allow convenient attachment of the device to doors swinging either to'the right or to the left.

For the purpose mentioned, use is made of an arm bearing against the door and attached to a spring-actuated spindle provided with a cam engaged by a spring-held friction roller. Use is also made of an adjusting device for adjusting the tension of the spindle spring for heavier or lighter doors.

A practical embodiment of the invention is represented in the accompanying drawings forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the views.

Figure 1 is a perspective View of the device as applied; Fig. 2 is a sectional side elevation of the device; Fig. 3 is an enlarged sectional plan view of the same on the line 38 of Fig. 2; and Fig. 4 is a plan view of the device as applied and showing the door partly open.

On one side of the door casing A carrying the hinged door B is secured a casing C, and in the casing O is mounted to turn a vertically-disposed spindle D provided at each end with a polygonal portion D engaged by a correspondingly shaped aperture in one end of a bearing arm E, carrying at its free end a friction roller F engaging a bearing G attached to the door B, as plainly illustrated in Figs. 1 and 4. Inside of the casing C is arranged a spring H coiled around the spindle D and having one end H secured to the said spindle, the other end H of the spring H adjustably engaging an eye bolt I held in the top of the casing C and serving to draw the end H of the spring H against a boss 0 formed on the inside of the casing C. Thus on screwing up the nut I on the eye bolt I the end H of the spring H is firmly clamped against the boss G, to fasten this end of the spring in position with a view to keep the spring H under the desired tension so that the arm E bearing with its friction roller F against the bearing G closes the door B after the same had been opened and released.

For heavier or lighter doors, it is desirable to adjust the tension of the spring H correspondingly, and for this purpose it is only necessary to loosen the nut I of the eye ,bolt so as to unclamp the end H of the spring H to permit the operator to push the end H farther through the eye bolt I for increasing the tension of the spring H, or by withdrawing the end I- .partly from the eye bolt I for decreasing the tension of the spring H. After the desired tension of the spring H is obtained, the nut I is again screwed up so as to clamp the end H of the spring H in position as previously explained. It will be understood that if the casing C is in position on the door casing, it will be necessary to remove it therefrom in order to adjust the spring H.

In order to prevent slamming of the door, the following arrangement is made: On the spindle D is secured a cam J, engaged at its peripheral face by a friction roller K journaled on a flat spring L pivoted at L on a sidewise extension C of the casing O, and the free end of the spring L extends into a sidewise extension 0 of the casing C, and is engaged by a set screw N, which, on turning, swings the spring L inward or outward so as to adjust the friction roller K correspondingly relative to the peripheral face of the cam J. For heavier doors the set screw N is turned to move the spring L toward the cam J so that the friction roller K bears heavier on the cam J when the door is closing, and when the set screw N is turned in an opposite direction then the spring L is swung away from the cam J and the friction roller K bears with less force on the cam J when the door is closing.

When it is desired to apply the device to a door swinging in the opposite direction from the one shown in Figs. 1 and 4:, then the casing C and the parts held therein is attached upside down to the door casing, and the bearing arm E is then attached to the opposite end of the spindle D at the polygonal portion D. Thus by the arrangement described the device can be readily applied to doors swinging to the rightor to the left.

The device shown and described is very simple and durable in construction, and composed of comparatively few parts, not liable easily to get out of order.

Having thus described my invention, I claim as new and desire to secure by Letters Patent:

1. A door check and closer, comprising a bearing arm adapted to bear against the door, a spring-actuated spindle carrying the said arm, a cam on the said spindle, a friction roller in engagement with the said cam, and a spring carrying the said friction roller.

2. A door check and closer, comprising a bearing arm adapted to bear against the door, a spring-actuated spindle carrying the said arm, a cam on the said spindle, a friction roller in engagement with the said cam, a spring carrying the said friction roller, and means for adjusting the said spring.

3. A door check and closer comprising a bearing arm adapted to bear against the door, a spring-actuated spindle carrying the said arm, a cam on the said spindle, a friction roller in engagement with the said cam, a spring carrying the said friction roller, one end of the spring being fixed, and a set screw screwing in the free end of the spring to adjust the spring and to move the friction roller relative to the said cam.

4c. The combination with a casing adapted to be fastened to a door casing, of a spindle journaled in the said casing, a bearing arm mounted on the spindle and adapted to bear against the door, an eye bolt held on the casing, a coiled spring on the said spindle and having one end fastened thereto, the other end of said spring adjustably engaging the eye bolt, a boss on the inside of the casing, and a nut screwing on the eye bolt to clamp the said end of the spring against the boss.

5. In a door check and closer, the combination with a casing adapted to be fastened to a door casing, of a spindle journaled in the casing, a bearing arm mounted on the spindle and adapted to bear against the door, an eye bolt having its stem extending through one end of the casing, a coiled spring on the spindle within the casing and having one end secured to the spindle, the other end of said spring adjustably engaging the eye of said eye bolt, a nut screwing on the stem of the eye bolt outside the casing to move the eye bolt, and means against which the end of the spring is drawn to clamp the same when the said nut is screwed up.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

JOHN G. LOFGREN.

-Witnesses JAMES C. KNIGHT, HENRY F. ANDERSEN.

Coni s of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. G. 

